QT and Video Interfaces

mranger90

Does it crash when executing inside of QtCreator or outside ?
If it crashes inside of QtCreator than check the stack trace.
If it crashes outside of QtCreator than you need to do a deploy.

mrjj

Hi
Seems to be a dangling pointer maybe ?
You have
QWidget* videoframe;

which you never set to anything in the code shown.

You show an ui file so i wonder if you mean

ui->videoframe
instead ?

To use the one you have placed on the UI and not the one you have manually added.

Pl45m4

This post is deleted!

Stevendragoes

@mranger90 said in QT and Video Interfaces:

Does it crash when executing inside of QtCreator or outside ?
If it crashes inside of QtCreator than check the stack trace.
If it crashes outside of QtCreator than you need to do a deploy.

Hi @mranger90 it crashed inside the QT Creator when I try to press the run button

Stevendragoes

@mrjj said in QT and Video Interfaces:

Hi
Seems to be a dangling pointer maybe ?
You have
QWidget* videoframe;

which you never set to anything in the code shown.

You show an ui file so i wonder if you mean

ui->videoframe
instead ?

To use the one you have placed on the UI and not the one you have manually added.

@mrjj yea I want to use the QVideoWidget inside the "videoframe" Qwidget that is created in the Ui shown in dotted rectangle in the UI screen shot. However I don't know how to use link it all together, is it ui->videoframe like you mentioned?

Stevendragoes

@mrjj So should. It be

vw = new QVideoWidget (ui->videoframe)
Instead of

vw= new QVideoWidget(videoframe)?

mrjj

@Stevendragoes
Hi
Yes as the UI hold the widgets you put in visually and
the other one seems like a dangling pointer which will crash.

Stevendragoes

Hello @mrjj

I have done the necessary changes. However, the video is not showing in the rectangle frame that I have drawn.

Stevendragoes

Hello @jsulm @mrjj

I have typed in according to what you have mentioned

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    player = new QMediaPlayer(ui->videowidget);
    vw = new QVideoWidget(ui->videowidget);
    player->setVideoOutput(vw);
}

However, the video does not load when I loaded the video. I have the text box to check the file path. the file path is fine. However, the video could not be displayed in the custom rectangle box that I drew.

Stevendragoes

Hello @jsulm and @mrjj

After trying out and researching, I found a lazy man's way of showing in the UI, could be called my first draft.

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    player = new QMediaPlayer(this);
    vw = new QVideoWidget(this);
    player->setVideoOutput(vw);
    vw->setGeometry(30,140,800,600);
    vw->show();
}

However, I want to cast into the grid layout as the result wasn't up to my expectations.. I want the videoframe to resize when the window resizes.. Any Idea how? I didn't use the QWidget to load the video. If i were to use the QWidget to load the video, it will be good.

jsulm

@Stevendragoes said in QT and Video Interfaces:

Any Idea how?

Well, put it into your layout.

Stevendragoes

Alright @jsulm I will go and learn about the layout and do some trial and errors. Any questions I will ask again. Thanks for assisting me